Oklo Inc. (NYSE:OKLO) is one of the top nuclear energy stocks to invest in for the next 5 years. On March 17, 2026, Oklo said the U.S. Department of Energy approved the Nuclear Safety Design Agreement for Atomic Alchemy’s Groves Isotopes Test Reactor in Texas under the DOE’s Reactor Pilot Program. The company said the approval followed the signing of the facility’s Other Transaction Agreement in January and marked another step in the project’s authorization pathway. With the NSDA approved, the project now ...